En nuestro país no se ha reportado ningúrn caso de hermafroditismo en moluscos con sexos separados (dioicos, posiblemente debido a los pocos trabajos que se realizan utilizando métodos histológicos, técnica que permite determinar con mayor presición los estadios de madurez gonadal, facilita la observación microscópica de las carácterísticas de las células sexuales y permite detectar los posibles casos de hermafroditismo que pasan desapercibidos con las observaciones macroscópicas.

En nuestro país no se ha reportado ningúrn caso de hermafroditismo en moluscos con sexos separados(dioicos, posiblemente debido a los pocos trabajos que se realizan utilizando métodos histológicos, técnica que permite determinar con mayor presición los estadios de madurez gonadal, facilita la observación microscópica de las carácterísticas de las células sexuales y permite detectar los posibles casos de hermafroditismo que pasan desapercibidos con las observaciones macroscópicas.

Evalúa las características morfohistológicas de la glándula pedal de cuatro (4) especies de Megalobulimus (Strophocheilidae), en el interés de identificar las posibles células glandulares que estén interviniendo en la producción de la baba usada en cosmética. La presente investigación analiza histológicamente la glándula de diversos géneros de caracoles terrestres, entre ellas las más buscadas por su baba, los Megalobulimus (cuatro especies), y compararlas con otras de cuatro géneros de diferente posición evolutiva (Succinea, Bostryx, Cornu y Heterovaginina). La evaluación a nivel histológico de los componentes celulares de la glándula de la baba de Megalobulimus spp. Mostró una composición estructural y celular más compleja que en otros gasterópodos terrestres debido a que incluiría adenómeros y acinos. La característica mássaltante en Megalobulimus spp. es la...

Introduction: Myrciaria dubia known as “camu camu” is a fruit that grows in the Amazon and its main characteristic is its high content of vitamin C. Ascorbic acid has a protective role in spermatogenesis as it is a compound that has excellent reducing action. The purpose of this research was to evaluate in vivo the cytoprotective capacity of the aqueous extract of the fruit of Myrciaria dubia (Kunth) McVaugh “camu-camu” against the mutagenic damage produced by the antineoplastic drug cyclophosphamide (CP) on the male germ line. Methodology: Mice (n= 60) were divided into five treatment groups: T1= negative control (without treatment); T2 ingested the aqueous extract (10mgkg-1), T3 ingested the aqueous extract (50mgkg-1), T4 ingested the aqueous extract (100mgkg-1); T5 is the positive control. All of them were injected with a single dose of CP (50 mgkg-1) intraperitoneally. Treatm...

Introduction: Tropaeolum tuberosum, known as "mashua" is an Andean tuber that holds both economic and nutritional value for low-income populations. It is believed that it affects male fertility because Andean men associate it with impotence and decreased fertility. Studies conducted on rats fed with "mashua" showed that there was a 45% decrease in the testosterone/dihydrotestosterone ratio. The effect of this plant on reproduction is related to its content of isothiocyanates, compounds that covalently bind to proteins, which may be directly or indirectly involved in the spermatogenic process. The purpose of this research was to evaluate the effect of the aqueous extract of "mashua" on spermatogenesis and reproductive physiology of mice. Methodology: In vivo morphofunctional parameters of mouse sperm (spermatogram) were evaluated and the expression of Cytochrome P450 17α-hydroxylase/17,2...

Introduction: Lead toxicity has been linked to different diseases in humans and several evidences suggest a strong relationship with the observed damage on reproductive function in humans and rodents. Method: Mice were given a single dose of lead nitrate (NP) (50mg/kg/bw), which were euthanized seven days post-injection with the aim of evaluating sperm to come out from the seminiferous tubules and are in transit through the epididymis. Also, the TUNEL test was done to evaluate the sperm DNA fragmentation.  Results: The decrease in body weight in mice treated with LN (p <0.05), suggest a toxic systemic effect. However, the same did’n happen on the reproductive system because the weights of the testes, epididymis, prostate and seminal vesicles were not altered (p>0.05), in the same way physiological values such as sperm concentration and motility didn´t decrease with the treatmen...